jQuery Interview Questions You Should Know

Today, I am sharing jQuery interview Questions you should know especially if you are preparing for a job interview. There are several questions but I will only share some for now and save the remaining ones for later posts.

jquery interview questions

Before we look at some questions, it is important to know that if you don’t know an answer to a question during any type of job interview including jQuery interviews, it is good to say that you don’t know the answer instead of making stuff up. Now that we have that honesty piece out of the way, let us enter the jQuery interview questions part:

jQuery Interview Questions

1)What is jQuery?

jQuery is a multi-browser JavaScript library designed to simplify client-side scripting of HTML. It was released in 2006 at BarCamp NYC by John Resig.

2)What are the advantages of using jQuery?

  • It has AJAX capabilities
  • Easy to learn, use and expand
  • Great built-in methods
  • From the definition, it is cross-browser.
  • Makes DOM Manipulation and Traversal easier.

3)Is jQuery a client-scripting or server-scripting library?

jQuery is used for client-scripting.

4)What is the difference between JavaScript and jQuery?

JavaScript is a language. jQuery is a library/framework built using JavaScript.

5)Can you use other client-scripting libraries alongside jQuery?

Yes you can. You can achieve this by using jQuery.noConflict() function to avoid any conflicts resulting from the use of $() by other libraries.

6)What does $ mean in jQuery?

The dollar sign is simply an alias for jQuery. That means you can use jQuery() instead of $(). In fact, you can use your own character in place of the $() – using jQuery.noConflict().

7)What is a Content Delivery Network (CDN)?

A large distributed system of servers deployed in different data centers across the internet. Normally intended to serve content to end-users with high availability and performance.

8)Where does code execution begin in jQuery?

Execution starts from $(document).ready() function which gets executed once the DOM is loaded.

9)Can you have multiple document.ready() functions on the same page?

Indeed. We can have as many document.ready() functions as we want.

10)How do you load jQuery?

  1. You can load jQuery locally or
  2. Load from a CDN like Google, Microsoft or jQuery

Loading locally:
< !DOCTYPE html>


Loading from a CDN:
< !DOCTYPE html>

11)How do you load jQuery when a CDN fails to deliver?
Load locally when CDN fails:

Written By Elisha Chirchir

Elisha Chirchir is a software developer. He is also the founder of Simple Developer and co-founder of Instinctive Software Solutions. On any given day, he works on both Android and Web Development. During his 'free time', he offers training to those interested in learning how to code in php, java, python, javaScript etc. You can easily find him on StackOverflow Android chatroom or on Twitter @Eenvincible

7 Comments on “jQuery Interview Questions You Should Know

  1. Yuval Reply

    July 11, 2013 at 6:58

    Thank you for sharing this, Elisha.
    One question I wanted to ask – as an interviewer: What slack do you leave for inspecting the candidate’s ability vs. their ability to carry out an action asked in your questions?

    I’ll use Q11 for reference – when one states that they do not know how to do so, char-by-char, but they do know what exception needs to be caught and present the exact logic behind the move.

    • Elisha Chirchir Reply

      July 11, 2013 at 2:19

      First, thanks for stopping by and secondly for leaving a comment. That question that you ask is a good one. I was mentioning the fact that some people might choose to make up stuff when they don’t know something. I have however learned that it is better to say that you don’t know the answer instead of lying that you know and wasting time. Thanks again for your input!

      • Yuval Reply

        July 11, 2013 at 2:59

        You’re most welcome, your website is very useful in many aspects.
        I was asking that question mainly because I have encountered several interviewers in the past, each one with a different approach (back when I was a job seeker).
        I’ve found the ones who appreciated “creative” answers the best interviewers, and not only because it was in my favor at these moments.
        I guess that this is a rather “philosophical” discussion, I believe an interviewer should find the balance point between what they expect their candidates to know (syntax-wise) and qualitative measurable.

        Anyway, I think it’s a good idea for a new “philosophical” article, it would be interesting to know your approach, go ahead and share it with job-seeking readers 🙂

  2. James McCormack Reply

    July 22, 2013 at 12:07

    Very useful – thanks! sometimes we use technology to get something done but don’t have all the pros, cons and functions at our fingertips. Useful if I get “a bit rusty”

    • Elisha Chirchir Reply

      July 22, 2013 at 1:57

      James, thanks for the visit and the comment as well. I am glad you found this post useful!

  3. Don Reply

    July 18, 2016 at 8:59

    Good stuff, thanks.

  4. Mahesh Patel Reply

    February 9, 2017 at 1:34

    Thanks, sir It was Very Helpful.
    Thanks for share with us, It was very helpful for cracking Jquery Questions.

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